Date: Wed, 11 Sep 1996 08:15:05 +1000 (EST) From: "Daniel O'Callaghan" <danny@panda.hilink.com.au> To: David Greenman <dg@root.com> Cc: hackers@freebsd.org Subject: Re: undocumented kernel priority changing Message-ID: <Pine.BSF.3.91.960911080953.19335B-100000@panda.hilink.com.au> In-Reply-To: <199609101329.GAA18135@root.com>
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On Tue, 10 Sep 1996, David Greenman wrote: > > > >Michael Smith: > >>> (10 minutes cpu time even on a 100 MHz 586 is pretty a lot ;) > > > >DG: > >} FreeBSD already has a sophisticated mechanism for controlling process > > > > Actually, it has a great effect on interactive performance. The algorithm > for priority calculation in FreeBSD is significantly different from the one in > 4.4BSD. For one thing, we take into account the CPU consumption of all of the > processes in the job. [snipped] > ratio of CPU given to 'background' processes - and there is no way that the > kernel can make any good arbitrary decision about this. Hmm, I actually like the automatic renicing when programs such as vi and pine run away with the CPU when their tty disappears. The machine is still usable interactively. Danny
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